Heating-stove.



Patented Apr. 29, |902.

E. R. CAHUUNE.

n HEATING sTovla.v

(Application med may 12, 1599.1

2 Sheets-Sheet l.

(No Model.)

www* -MINIMUM.

No. 698,797. Patented Apr. 29, |902.

E. n. cAHooNE.

HEATING STOVE.

(Application led May 12, 1899.)

(No Model.) 2 Sheets-Sheet 2.

YlhJiT-iii) STATES PATENT rnrcn'..

EDVIN R. CAHOONE, OF NEWARK, NEW JERSEY.

HEATING-s'rove.

SPECIFICATION foi-ming part of Letters Patent No. 698,797, dated April 29, 1902.

Application led May 12, 1899. Serial No. 716,555. (N model.)

To tZZ whom, it may concern:

Be it known that I, EDWIN R. CAHooNE, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented new and .useful Improvements in Heating-Stoves, of which the following is a specification.

My invention relates to an improved heating-stove for burning bituminous coal. In my former patents I have applied the broad principles of this invention to cook stoves or ranges. However, by the specific construction and arrangement of the parts hereinafter described I successfully burn soft coal for heating purposes.

The object of the invention is to provide in a heating-stove means for delivering heated air` above the bed and through the body of the fuel and separate lmeans for supplying heated air under the fuel to set free and mix the gases for the purpose of promoting combustion.

A further object of myinvention is to provide a combination of stove elements for burning bituminous coal for heating purposes, comprising aiire-pot, tubes for directing air to the top thereof, a series of openings communicating with the lower-portion of said fire-pot for admitting heated air, said air meeting the yair delivered through the tubes in the body of the fuel, and means for preventing the f nel from packing or massing.

Many other objects and advantages will be hereinafter described and be particularly pointed out in the claims.

. In the drawings, Figure l is a section of a heating-stove, illustrating my improvements. Fig. 2 is a cross-section of the same on the line 2 2, Fig. l. Fig. 3 is a similar view on the line 3 3, Fig. 1. Fig. t is a similar view on the lines 4 4 of Fig. l, except that the inner ends of several fire-bricks forming the lower part of the fire-pot are in full lines. Fig. 5 is a detail View of a depending tube and its connection with the top of the stove. Fig. 6 is a'section of the same, taken atyright angles to Fig. 5.

iication of the same. Fig. 7 is a vertical section of a modified form of stove structure. Fig. 8 is aview of a modified form of depending tube, showing the upper end divided into two inlets and having an air-chamber located of combustion. Fig. 6a is aview of amodi-V in its bodyportion. Fig. 9 is a seetionalview showing a modied form of stove. Fig. 10 is a detail view of a tip for the lower end of the depending tubes. Y Fig. 11 is a similar view of a slight'modification of theysame.

l represents the stove-casing, which maybe of any Well-adapted configuration. Within the lower part of the casing is located the firepot, comprising an upper and a lower section, the lower section being made up of a series of preferably refractory fire bricks 3 or the equivalent, said bricks being so proportioned that the'outer ends will bear against the stovecasing l and the inner ends extending far enough inward toward the center to support the upper section 4:. The bricks 3 have formed on the top, at their inner ends, a step 3', forming a seat for the upper section to rest on. The upper section 4t is thus supported by the brick 3 and is internally tapered toward the top, said tapering wall being corrugated or tinted on its infner face, the corrugations varying in size, those nearest the top being the largest.

5 represents the grate, which may be of any desired construction, the fire-pot sections being mounted above the same, and under the grate is the usual ash-pit.

A space or chamber Gis formed between the fire-pot and the casing, said chamber communicating with the escape-flue at 7. Entering the air-chamber 6 are several (more or less) hollow castings 8, provided at their outer ends with mica, forming combined sight-openings and air-inlets 7 A hot-air inlet 9, controlled by a damper 90, is `formed in the bottom of the frame 8, through which air passes to the chamber 6, from whence it enters the iire-pot between the bricks 3. A depression,channel, or the equivalent 10 is formed in the stovecasing adjacent the opening 9 to direct the heat as it rises to and through the opening in the frame 8, where it commingles with the air entering directly from the atmosphere, so that the latter is heated beforey reaching the point In Fig. 7 I have illustrated a slight modification of this feature, air be` ing admitted through the perforations in the stove-casing, from whence said air enters the openings 9 and is delivered directly to the ire-pot.

The stove-top 125 is provided with the usual IOO fuel-inlet and has also short depending hollow protuberances 13 for 'supporting one or a series of tubes 11. Over the -top 12 is an ornamental perforated cover 16,through the perforations of which air passes to and through the pipes 11. While the application of the cover to a stove of this character is more for ornamental purposes in this instance, it forms an air-heating chamber, a damper 16 being employed to regulate the supply of air thereto.

To more effectually direct air to the fuel, which is sometimes necessary when burning certain grades of coal, I provide a series of tubes or trunks 17, located just above the fire-pot, a damper 18 being employed to regulate the supply of air admitted through said openings.

In the modification shown in Fig. '7 theseries of pipes are dispensed with and a single removable tube 19 depends centrally within the fire-pot. In said figure, 2O represents the casing, having in the upper part thereof a passage 20', leading to an air-heating chamber on topof the stove and withwhich the tube 19 communicates. It is obvious as the air enters the passage 20 it is subjected to the 'heated parts of the stove, and by the time the tube is reached it will be thoroughly heated.

In the construction shown in Fig. 9 the firepot is mounted on legs 22, supported by the stove-base, said fire-pot communicating ywith an air-heating chamber 23, making a direct passage for the introduction `of air to the fuel from the inlets 24. The air entering the chamberpasses under the grate to the fuel, where it. is mixed with the air delivered through the depending pipes or tubes, whereupon the gases as they are set free are'mixed and ignited. The heated air entering the chamber under the fire-pot is prevented from escaping to exit-flue by two forwardly-projecting plates or shields 25.

In Figs. 5 and G and 6, 26 indicates a crossbar in the depending protuberances, and 27 a similar cross-bar in the upper end of the depending pipe, the two bars being connected by a link 28. rIhe result isobvious. Should large pieces of fuel strike the pipe, it will give sufficiently to prevent injury of the parts. In Fig. 6 the depending pipe is located on theoutside of the protuberances instead of on the inside, as shown in Figs. 5 and G.

On the lower end of the depending pipes tips, such as shown in Figs. 8, 9, 10, and 11, may be employed to prevent the heat from destroying said pipes. However, it is not at all necessary that this feature should be used except under certain conditions, and I desire it to be understood that I reserve the right to the use of a pipe with or without the tip.

By constructing the upper section of thefire-pot as hereinbefore described the gases- Ain the fuel can be more readily set free and mixed with the heated air, and hence ignited. The green fuel being, as a rule,nearer the top, the largest grooves are provided atthis point .o accommodate the proportionate volume of gas generated, which is by reason of the fuel not having become incandescent. The gas, having suilicientspace to move abou t,becomes somewhat separated by the various air-currents mingled therewith, which produces a high grade of combustion. Moreover, the corrugations prevent the fuel from packing'- that is to say, as the fuel becomes heated it expands and the grooves receive the expanded mass. The fuel being incandescent in the lower part of the fire-pot, the corrugations decrease in size toward the bottom, it being unnecessary to provide large gas room, for the reason that at this point the gases have been sufficiently' burned. Moreover, as the fuel in the bottom of the pot is consumed the tapering formation of the fire-pot andthe weight of the fuel above absolutelyprevent the mass from congealing. Y

The construction shown in Fig. 8 furnishes a greater air-inlet at the mouth of the pipe and is preferably formed in two sections. The upper end branches out into two receiving-mouths, and inv its body portion an airheating chamber 32 is formed. A series of baffle-plates 33 in the chamber causes the air to bein contact with the heated walls of the pipe for a considerablelength of time, so that by the time the air reaches the fuel it is highly heated. A perforated hollow tip 34 at the end of the pipes serves to direct currents of air to the fuel. .The heating-chamber 32 is important, in that, so far as I am aware, this Vis IOO the first depending pipe for a heating-stove provided with an air-heating chamber.

The operation of the stove shown in Fig. l is as follows: Fuel is delivered tothe fire-pot through the usual feed-opening. The dampers are all opened for a perioth-c'. e., while kindling. Vhen the iire has kindled sufficiently, the dampers 1S are shut off and the damper 16 operated according to the amount of heat required. The lire now being fully started, air is admitted through the depending tubes or pipes, and also through the depending tubes or trunks in the lower part of the casing. These two air-currents meet and commingle at a point indicated bythe double arrows W, (see Fig. 1,) producing substantially complete combustion. above in describing the upper portion of the fire-pot, this high grade of combustion is brought about by the peculiar action the corrugated section of the tire-pot has on the gases in the fuel, the hot air coming in under the grate and the air-currents coming lfrom the depending pipes mix with the gases as rapidly as set free, whereupon ignition immediately takes place. The products after having' passed through the fuel passes into the chamber G tothe exit 7. To obtain a quick fire, I have found I get better results by using the. air-tubes 17, while at times when using certain kinds of fuel I prefer to use the tubes or trunks in connection with the depending pipes.

Referring to Fig. 7, the draft admitted IOS IIO

However, as stated through the tubes or trunks 2l is directedv down toward the bottom of the fuel in a heated state, whereupon as it returns it is met and commingles with the hot air delivered to the topof the fuel by the depending tube, andk practically the same grade of combustion is,

obtained.

In all essential details the operation of the structure shown in Fig. 9 is the same as that my invention will be understood by those skilled in the art. The structure set up is extremely simple and durable and one easily operated.

Having described my invention, what I claim is- 1. A stove comprising a casing, a fire-pot, said fire-pot havingaseries of openings in the lower portion which communicate with a space or chamber formed between the casing and the fire-pot, through which the products of combustion pass, an exit-flue communicating with said space or chamber pipes or tubesY depending within and arranged around the firepot for delivering currents of air through the fuel to the exit-liuc, and castings or tubes for introducing individual currents of air around the under side of the fuel, substantially as described.

2. A stove comprising a casing, a fire-pot, a pipe or tube loosely suspended and directed toward said fire-pot, and means for loosely supporting said pipe or tube comprising a bar in the tube-support, abar in the top of the tube, and a connecting-link between said,v

bars substantially as described.

3. In a heating-stove, the combination with the fire-pot, air-inlet openings to supply air at various angles downwardly above the fuelbed, a hot-air chamber surrounding said firepot, a damper operating over said openings, an exit-flue communicating with the air-chamber at the upper end thereof, an air-heating chamber, a series of loosely-hung pipes or tubes depending from said latter air-heating chamber toward the f nel-chamber adapted to deliver heated air downwardly through the fuel under the iniiuence of the draft, and castings or tubes for introducing individual currents of heated air in the hot-air chamber and .aroundv below the fuel, substantially as described.

4. In a heating-stove, the combination with a fire-pot surrounded by an air-chamber, an exit-flue communicating with the air-chamber at the upper end, openings in said fire-pot which communicate with said air-chamber for delivering heated air to the body of fuel from the under side, castings or tubes for introducing hot air to the air-chamber, vdownwardly and at an angle, and depending pipes or tubes for delivering air downwardly through the bed of fuel, the air delivered through the pipes meeting the hot air coming from the castings or tubes under the fuel which mixes with and consumes the escaping gases under the influence of the draft of the stove, as set forth.

5. In a heating-stove, the combination with the fire-pot, a chamber surrounding said firepot, an exit-flue communicating with said chamber, the lower portion of said fire-pot having a series of openings, means for directing hot air through said openings to and through the body of fuel, ahot-air chamber, and a series of depending tubes communicating with said chamber, said tubes delivering heated air above and through the fuel to meet and mix with the air delivered through the openings in the lower portion of the fire-pot,v

said mixed air-currents being drawn through the openings in the lower portion of the firepot to the exit-flue, substantially as described;

6. In a heating-stove, the combination with lthe nre-pot made in sections, the upper section being tapered toward the top on its inner side and opened at both ends, and the lower section being provided with openings, an airchamber formed between said fire-pot and the casing, means for supplying air to said air-chamber, an air-exit iiue communicating with said chamber, and a series of pipes for delivering currents of air downwardly through the fuel from the top, under the influence of the main draft, substantially as described.

7 In a heating-stove, the combination with a fire-pot composed of an upper section having a series of tapering grooves, the latter being deepest at the top, and a lower section having a series of openings, an air-heating chamber surroundingk said fire-pot and provided with an exit-flue, a plurality of depending tubes adapted to delivercurrents of heated air above and through the 'bed of the fuel, and a damper for regulating'the admission of air to the fire-pot, substantially as described. p f

S. A heating-stove comprising a fire-pot made of a lower section provided with a series of openings, and an upper section having its inner wall tapering and provided with a series of corrugations, an air-heating chamber surrounding said fire-pot, an exit-iiue communieating with saidair-heating chamber, andmeans for delivering a plurality of air-currents through the fuel from the-top, substantially as described.

` l 9. A heating-stove comprising a tire-pot made up of a lower section having a series of openings, and an upper section having its inner wall tapering and provided with'a series of horizontal corrugations, in combination with an air-heating chamber surrounding said fire-pot, an exit-flue communicating with said IOO IIO

Aair-heating chamber, and means for deliverchamber surrounding the re-potand lcom-v municating with said pot through the openings in the lowersection, means for delivering air above the bed of the fuel, means for delivering air to the air-heating chamber, said latter volume of air meeting thepvolume of air delivered above thefuel as the same is didu'sed by the conical formation-of the up? per section of the fire-pot, substantially as described.

.11. A stove comprising a casing, a fire-pot,

and means for delivering heated air to said fire-pot, said means consisting of a frame open at the front and provided with a window, an opening in the under side of said frame, and a groove in the casing leading to said opening to direct air thereto, substantially as described. Y

12. A stove comprising a casing, a lire-pot, and means for delivering heated air to said fire-pot, said means consisting of a frame having an opening in its under side, and a groove in the casing leading to said opening to direct air thereto, substantially as described.

13.v In a stove, the combination with the casing, a grate, a tire-pot composed of a lower section made upof a series of radially-disposed and spaced-apart partitions, and an upper section seated on said lower section, means for supplying air through the spaces between the partitions, and means for delivering air above and in the fire-pot, substantially as described.

14:. .In a stove, the combination` with the casing, a grate, a fire-pot composed of a lower section made up of a series of e radially-disposed and spaced-apart partitions, and an upper section supported by said lower section,

. the internal wall of said upper section having a series of variable grooves the latter being larger at the upper end of said section, means for supplying air through the spaces between the partitions, and means for delivering air above and in the fire-pot, substantially as described. A

15. In a stove, the combination with the casing, a grate, a series of vertically-spaced partitions above the grate, said partitions eX- tending out therefromvinto an air-chamber forming air channels or passages, and a lirepot section mounted on the upper end of the vertical partitions the interior wall of said section being tapered and providedV with a series of grooves, said grooves increasing in size from the bottom to the top of said section, substantially as described.

16. In a stove, the combination with the stove structure, a grate, a lire-pot composed of a lower section made up of a series of vertically-spaced partitions above the grate, an

.upper section mounted on said partitions the inner wall of which is conical and provided with aseries of variable grooves, an air-chamber surrounding said fire-pot, hollow. trunks or housings communicating withthe air-chamber, the under side of each housing or trunk .having a perforation for introducing heated air to the air-chamber, from whence it passes through the spaces between the vertical partitions to the body of fuel, an air-chamber located in the stove structure and above the casing, a grate, a dre-pot composed of two sections, the lower section being made of a series of spaced-apart. partitions above the grate, and the upper section mounted on said partitions, and an air-chamber with means for introducing air thereto, the partitions forming the lower. portion'of the re-pot projecting into the air-,chamber forming-the passages or channels for the air to bedelivered to the fuel, substantially as described.

18. A stove comprising a casing, a grate, a lire-pot composed of two sections, the lower section being made up of a series of vertical partitions above saidV grate, seatsformed in the upper ends of the vertical partitions, the upper section having its interior smaller at the top than at the bottom, said section being mounted in and supported by the seats in the upper ends of the vertical partitions, an airheating chamber, vthe Vpartitions extending out and within said chamber, and means for supplying said chamber with air, substantially as described. Y

19. In a stove, the combination with a repot having a series of openings at its lower portion, a chamber surrounding said firepot, means for introducing air to said chamber, a series of tubes arranged to deliver individual currents of air to the top of the fuel at an angle, a flue, an air-heating chamber, a tube communicating with said air-heating chamber to direct currents of heated air downwardly to the top of the fuel, substantially as described.

20. In a heating-stove, the combination with an air-chamber, a lire-pot, air-opening in the lower portion of said fire-pot, a frame or frames mounted within said casing which communicate with said air chamber, the fire-pot being in communication therewith through the opening in its lower portion, the frames having openings located in the under side thereof, and an inclined bevel channel or surface on the stove-casing located under said openings, substantially as described.

21. In a heating-stove, the combination with IOO IIO

a stove-casing, a lire-pot having openingsin the lower portion thereof, a corrugated section formed in the upper part thereof, a series of dampered tubes or trunks arranged in the casing and above the fire-pot, and a series of openings beingarranged in thelowerpartof the casing to deliver heated air to said fire-pot to commingle with the air delivered thereto through the tubes, substantially as described.

22. In a heating-stove,the combination with a casing, a fire-pot, which tapers internally toward the top and is provided with openings at the bottom, an air-chamber surrounding said fire-pot, means for introducing air thereto, an airchamber,tubes communicating with said chamber for delivering air downwardly into the fire-pot, and a series of trunks or tubes located inthe casing and adapted to inv troduce air to the fire-pot independently of the tubes communicating with the air-chamber, substantially as described.

23. In aheating-stove,the combination with a casing, a fire-pot which tapers toward the top and is provided internally with variablyarranged grooves, a space being formed between said fire-pot and the casing, an exit-fine communicating with said space, and means forintroducing currents of heated air through the fuel from the top under the influence of the draft, substantially as described.

24. In a downdraft-stove, the combination of a support for fuel, a series of air-supply tubes arranged contiguous with the front and side walls of the same to direct jets of air downwardly through the fuel, and a series of air-tubes arranged intermediate of the tubes at the side walls for delivering air downwardly through the fuel, substantially as described. f Y

25. In a downdraft-stove, the combination of a support for fuel, an exit-flue, a series of supply-tubes arranged contiguous with the front and side walls of the same to directjets of air downwardly through the fuel, a series of air-tubes arranged intermediate of theV tubes at the side walls for delivering air down` wardly through the fuel, and a plurality of passages located near the bottom of the stove, and communicating with the exit-flue, substantially as described.

26. In a stove, the combination wit-ha lirepot, a flue, which communicates with the firepot at the lowerend, an air-heating chamber which is supplied with air direct from the atmosphere, and a series of tubes comm unicating with said air-heating chamber for directing currents of heated air downwardly through the fuel from the top which mixes and ignites the gases escaping under the influence of the main draft, substantially as described.

27. In a stove, the combination'with a iirepot, a flue, an air-heating chamber, a seriesof tubes communicating with -said air-heating chamber for directing individual currents of heated air downwardly through the fuel from the top, a separate series of tubes arranged at an angle to direct individual air-currents to the top of the fuel under the influence of the inain draft, and means for controlling the admission vof air to said tubes, substantially as described.

28. In a stove, the combination with a firepot, an air-heating chamber, a series of tubes communicating with said air-heating chamber for directing currents of, heated air downwardly through the fuel from the top under the infiuence of the main draft, an air-heating chamber surrounding said fire-pot, a iiue communicating with said air-heating chamber at the lower end, and castings or tubes for introducing individual currents of air at various angles to the lower portion of the firepot to mix with the heated air delivered thereto by the aforesaid tubes, substantially as described.

29. In a stove, the combination With a firepot, an air-heating chamber, a series of tubes communicating with said air-heating chamber for directing currents of'heated air downwardly through the -fuel from the top under the influence of the main draft, an air-heating chamber surrounding said fire-pot, a flue pot, having openings in its lower portion, an

air-heating chamber, tubes communicating with said air-heating chamber for directing currents of heatedV air downwardly through the fuel-from the top, anl air-heating chamber surrounding said lire-pot and communicating with the latter, a plurality of means for introducing heated air to said chamber, and means forA delivering heated air to said plurality of air-introd ucin g means, substantially as described.

3l. In a stove, the combination with a firepot, which is open at the bottom and of tapering formation internally, the narrowest portion being at the top, said internally-tapering portion having a series of grooves, an aira heating chamber surrounding said'fire-pot, means for introducing heated air to said chamber, an exit-fine communicating with said chamber, and a plurality of tubes for directin g air-currents downwardlythrough the fuelfrom the top under the iniiuence of the draft, substantially as described.

Intestimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

f EDWIN R. cAHooNE.

Vitnesses:

WALTER A. WILLIAMS, GEO; E. FRECH.

IOO 

